US3089108A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductor strain gauge
Assignee: Electro Optical Systems Inc
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Filing: 1962-09-05
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Granted: 1963-05-07
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Expires: 1982-09-05
Abstract
No abstract record available.
Inventors
- 👤 Gong Howard
- 👤 Sanchez Joseph
- 👤 Robert E Talmo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:36
CPC Classifications
G; G01; G01P; G01P15/00; G01P15/02; G01P15/08; G01P15/12; G01B; G01B7/00; G01B7/16; G01L; G01L1/00; G01L1/18; G01L9/00; G01L9/02; G01L9/04; H; H01; H01C; H01C13/00; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49082; Y10T29/49103
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
A STRAIN GAUGE COMPRISING AN ELONGATE UNITARY SINGLE SEMICONDUCTOR CRYSTAL BODY, SAID BODY BEING OF EITHER P OR N TYPE CONDUCTIVITY OF A PREDETERMINED CRYSTALLOGRAPHIC ORIENTATION, SAID CRYSTAL BODY BEING A FLEXIBLE BEAM HAVING ITS SURFACE ETCHED TO MICROSCOPIC SMOOTHNESS, SAID BEAM HAVING A LENGTH TO SMALLEST CROSS-SECTIONAL DIMENSION RATIO IN THE RANGE FROM ABOUT 50:1 TO ABOUT 4000:1 TO RENDER SAID BEAM FLEXIBLE, SAID SMALLEST CROSS-SECTIONAL DIMENSION BEING IN THE RANGE FROM ABOUT 0.00025" TO 0.003"; AND FIRST AND SECOND ELECTRICAL TERMINALS IN LOW RESISTANCE OHMIC CONTACT WITH SAID BODY NEAR THE ENDS THEREOF.
Claim 2
Dependent Claim
95 words
A STRAIN GAUGE COMPRISING AN ELONGATE UNITARY SINGLE SEMICONDUCTOR CRYSTAL BODY, SAID BODY BEING OF EITHER P OR N TYPE CONDUCTIVITY OF A PREDETERMINED CRYSTALLOGRAPHIC ORIENTATION, SAID CRYSTAL BODY BEING A FLEXIBLE BEAM HAVING ITS SURFACE ETCHED TO MICROSCOPIC SMOOTHNESS, SAID BEAM HAVING A LENGTH TO SMALLEST CROSS-SECTIONAL DIMENSION RATIO IN THE RANGE FROM ABOUT 50:1 TO ABOUT 4000:1 TO RENDER SAID BEAM FLEXIBLE, SAID SMALLEST CROSS-SECTIONAL DIMENSION BEING IN THE RANGE FROM ABOUT 0.00025" TO 0.003"; AND FIRST AND SECOND ELECTRICAL TERMINALS IN LOW RESISTANCE OHMIC CONTACT WITH SAID BODY NEAR THE ENDS THEREOF.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-05-06 | 1966-11-05 | 1967-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-06 | 1970-11-05 | 1971-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-06 | 1974-11-05 | 1975-05-07 | $7700.00 | Window Closed / Lapsed |